[libvirt-users] Isolated networks && test lab

Laine Stump laine at laine.org
Thu Aug 27 22:43:04 UTC 2015


On 08/27/2015 02:48 PM, Spanky Horawitz wrote:
> Lesson learned.  I think I had the same IP address assigned to my VM
> router as I did the Host.

Ah, I should have read this response first, but I assumed it was just a
duplicate message without looking at the content (happens a lot when
someone sends mail to both libvirt-users and libvir-list, so I kind of
expect it).

As long as you don't care that the guests can reach the host if they
really want to, and you have the guest IP configuration done manually,
this won't be a problem. If you're really pedantic about isolating the
guests from the host and/or need them to get their IP address from DHCP,
then you'll need to do what I described in the other message.

>
> Side question: where are the virtual networks stored when you create
> them w/VM Manager?

They are stored in /etc/libvirt/qemu/networks, but you should never
access/modify those files directly. Instead, use "virsh net-dumpxml
$netname" to look at the config of a network, and "virsh net-edit
$netname" to modify it (or variations of "virsh net-update $netname..."
to make some changes that can be done without shutting down/restarting
the network).
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